Khan Academy: Introduction to Combinatorics

In this introduction to functions video, Sal intuitively defines a function and introduces the function notion f(x). He finishes the video by looking at a simple example of evaluating g(f(x)) without getting into the complexity of...

An introduction to why we use t statistics.

Introduction to Exponential Decay. Using the exponential decay formula to calculate k, calculating the mass of carbon-14 remaining after a given time, and calculating the time it takes to have a specific mass remaining. [9:19]

Introduction to experiment design. Explanatory and response variables. Control and treatment groups.

Introduction to residuals and least squares regression.

Introduction to sampling distributions.

This video [1:14] lesson is an introduction to Parabolic Arcs. What do parabolic arcs have to do with blades of grass?

Introduction to sample slopes and using them to make confidence intervals or do a test about the population slope in least-squares regression.

This video [1:59] is an introduction to subdivision surfaces. You can animate it using just a couple of points so we've solved the complex problem of creating curves by breaking it down into steps we can solve with math.

Introduction to the chi-square test for homogeneity.